<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <title>数组的扩展与修复</title>
</head>

<body>
  <script src="./util-array.js" charset="utf-8"></script>
  <script type="text/javascript">
    var arr = [];
    console.log("arr: " + Array.isArray(arr));
  </script>
</body>

</html>
